Improvement in casting pipe



@Nunen Sterns Paritair errori@ SAMUEL FULTON, OF COSSHOHOCKEN,PENNSYLVANIA.

IMPROVEMENT IIN CASTING PlPE.

Specification forming part of Letters Patent No. 32,359, dated May 2l,186i.

.To @ZZ whom t may concern,.-`

Be it known that I, SAMUEL FULTON, of

Conshohocken, in the county of Montgomery and State of Pennsylvania,have invented a new and useful Improvement in Forming Molds for CastingSmall. Pipes, and I do hereby declare that the following is a ful-l,clear, and exact description of the same, reference being hadto theannexed drawings, making a part of this specification, in which- Figuresl and 2 are vertical sections of a flask with a pattern within it, alsobisected vertically, the two parts aforesaid showing one part of myinvention, Fig. 3, a vertical section of a portion of the fiask, showingthe manner in which beads may be cast on the pipes; Fig. 4, a detachedview of' the pattern by which the mold is formed with the recess toadmit of the bead being casi.

Similar letters of' reference indicate corresponding parts in theseveral figures.

l The object of this invention is to avoid the manipulation andconsequent time and labor hitherto required in forming molds for castingsmall metal pipes. To this end I employ a flask and a pattern, theformer having its internal diameter greater than the external diameterof the pipes to be cast, and the latter corresponding in its externaldiameter to the internal diameter of the pipes, and by means of anysuitable power drawn vertically through the flask while the fiask issupplied with sand, thereby forming the mold without the operation ofhand-ramming. Theflask is also provided with slides at suitable points,to admit of boss-patterns being applied to the pattern for the purposeof' forming the mold so that bosses may be cast on the pipes without thetrouble and embarrassment hitherto attending the forming of molds forsuch purpose. A ring or bead pattern is also used in connection with ajoint in the flask, so as to enable the mold to be so formed that pipesmay, when required, be cast with beads at one end.

To enable those skilled in the art to fully understand and use orpractice my invention, l will proceed to describe it.

A represents a flask, which is of cast metal and formed of three parts,a b c, connected together by hooks d, which are tted over flanges e, asyshown clearly in Figs. l and 2. The two lupper parts, a b, constitutethe fiask proper and are equal in diameter. The part o is also of' thesame diameter; but it has rings f (two or more) cast on its inner sideand projecting therefrom asuitable distance, the lower end ofthe part bof the flask, also a ring, g, projecting from its inner surface andcorresponding in dimensions with the ringsfof the part c. The upper endof the part b also has a similar ring, h, the under side of which isbeveled. The upper part, a, of the flask, it will be seen, is notprovided with any rin gs or p rojections.

B represents a pattern which is of cylindrical form, of' cast metal-atleast that would be the preferable material. This pattern is not ofequal diameter throughout, the upper portion, t, being considerablysmaller than the lower part, j, and the portion k between being ofcurved form. The upper part, c, of the fiask is provided with slides Zat suitable distances apart, said slides, when opened, affording acommunication with the interior of -the flask at certain points for thepurpose hereinafter described.

In order to form a mold for casting a pipe without a bead, the operationis as follows: The pattern Bis rst placed within the lower part, c, ofthe flask, and the part c secured permanently in a vertical position.lThe pattern B is then lowered in the part c, the pattern just fittingwithin the rings f, which serve as guides for the pattern, and insureits concentric position within the flask. rIhe part b is then clamped tothe part c, and the part c clamped to the part b by the hooks d. Sand isthen poured into the top of the flask, the top of part a. This sandpasses down within the `fiask and rests on the ring or projection g ofthe part b of the fiask, said ring or projection forming a bottom. Assoon as the part Z1 of the flask is filled with sand, the pattern B iselevated by any convenient power, and the sand is still poured into theflask as the pattern is drawn through it, so that the sand will keepnearly up to the top of the pattern, and the latter may be drawn throughthe fiask as rapidly as the flask may be supplied with sand. The drawingupward through the flask of the patternB forms the shell of the mold,the sand (designated by ax) being compressed between the flask and thepattern, which ascends and compresses the same with a wedge-like actiondue to the curved taper form of the pattern,

and the usual hand-ramming being thereby avoided, The part b of theflask is an important feature of the invention, as it enables thepattern to form a compact sand surface or mold at the lower part of a.This result could not be obtained without the part b, as there is notsufficient space between the upper part of the pattern and the iiask tocontain enough sand toadmit of the mold being properly formed at thecommencement of the elevation of the pattern. The sand in the part b, itwill be un derstood, forms no part of the mold proper, and it is removedat the commencement of each operation.

Vhen pipes are to be cast with abead at one end, the upper part, a, isdetached from the part b before the pattern B is drawn' entirely throughthe latter, and a ring, C, (sce Fig. 4,) is introduced between the twoparts a b, said ring having a bead, 7c', on it. The part a is thenlowered and clamped, and the bead 7c of course leaves its imprint in thesand. (See Fig. 3.) The pattern B is then again raised and drawn throughtheflask. The usual cores are used in casting the pipes, and the ring Cis removed before the insertion of the core.

When pipes are to be cast with bosses on them, the slides Z are openedas the larger part of the pattern B passes them, and the operator,

b introducing a 3ro er tool scra )es awa a Y e P l Y portion of thecompressed sand and places a bosspattern, m, which is a section orportion of a ring or band, against the pattern B, and then replaces thesand. As the pattern B rises above the boss-patterns m, the latter dropto the bottom of the part c, and their imprints are left -in the moldand cause the bosses to be caston the pipes.

Having thus described my invention7 what I claim as new, and desire tosecure by Letters Patent, is-

l. Forming molds for casting pipes by drawy ing up vertically through aproper flask, A, a

pattern, B,while the sand is being poured into the ask, the patternbeing formed, substantially as described, so as to compress the sandwithout any ramming or other treatment thereof. t

2. Forming the flask A of three parts ab c the part a being smooth, andthe parts b c provided with internal rings or projections, to operate asand for the purpose set forth.

3. In connection with the two parts a Z1 of the iiaslr, the ring C,provided with the bead 7c', arranged as and for the purpose specified.

4. The boss-patternsm,when inserted through slides Z in the sides of theiiask and adjusted to the pattern B, as and for the purpose set forth.

SAMUEL FULTON. Vitnesses:

' AUGT. SCHWARZ,

WM. W'. DALBEY.

